(-2.1)*6.5*(-3⼀7)的运算

2025-02-26 07:24:56
推荐回答(1个)
回答1:

问:(-2.1)*6.5*(-3/7)的运算
=-21/10x13/2x(-3/7)
=-21/10x(-3/7)x13/2
=9/10x13/2
=117/20
=5又17/20